Negative angle bending and stamping device

Abstract

The utility model belongs to the field of bending, and provides a negative angle bending stamping device which comprises an upper die base and a lower die base, the upper die base is movably arranged above the lower die base, and a pipeline is horizontally positioned and installed on the lower die base. The bending mechanism is arranged on the upper die base, and the bending mechanism is provided with a driving block which can be switched between a first bending stroke and a second bending stroke; the traction mechanism is arranged on the lower die base and used for guiding the driving block to be switched between the first bending stroke and the second bending stroke. Compared with the prior art, the pipe bending machine has the advantages that the driving block is guided by the traction mechanism to be accurately switched between two different strokes, so that the quality of a pipeline is not damaged, a guarantee is provided for a formed bent pipe to meet the use requirements of customers, the whole bending process is automatically operated, and the production efficiency is improved. The influence of human factors is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of bending, specifically relating to a negative angle bending stamping device. Background Technology

[0002] In modern industrial production environments, the requirements for pipelines are becoming increasingly stringent and diverse, thus requiring various pipeline components with complex shapes and different specifications to adapt to different application scenarios.

[0003] Traditional methods for bending pipes involve using manual tools or simple mechanical devices. These methods require operators with extensive experience and skills, and each bend necessitates setting up new molds, resulting in long production cycles and high costs. Furthermore, existing bending methods rely on manual judgment and operation, making it difficult for even the most skilled technicians to guarantee consistency and accuracy in each bend, especially when producing large batches of the same specifications repeatedly. Inaccurate bending can lead to pipes that fail to meet usage requirements, affecting product quality and yield, while also reducing overall production efficiency. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is to propose a negative angle bending and stamping device with a simple overall structure, faster and more accurate bending process, ensuring stable forming of the required bent tube, simplifying the operation process and improving production efficiency.

[0005] The technical solution adopted by this utility model to solve its technical problem is to propose a negative angle bending and stamping device for bending and forming a bent pipe at an angle to the pipe, including: an upper die base and a lower die base, wherein the upper die base is movably disposed above the lower die base, and the pipe is horizontally positioned and installed on the lower die base;

[0006] A bending mechanism and a traction mechanism are provided. The bending mechanism is disposed on the upper die base and has a drive block that can switch between a first bending stroke and a second bending stroke. The traction mechanism is disposed on the lower die base and is used to guide the drive block to switch between the first bending stroke and the second bending stroke.

[0007] When the upper die base approaches the lower die base, the drive block in the first bending stroke moves against the traction mechanism to guide the drive block to bend the pipe in the vertical direction; when the drive block switches to the second bending stroke, the traction mechanism can push the drive block to rotate relative to the upper die base to bend the pipe end into a bent pipe.

[0008] In the aforementioned negative angle bending and stamping device, the traction mechanism includes a guide block and a traction block. The side wall of the guide block forms a guide plane, the traction block is connected to the bottom wall of the guide block, and a traction inclined surface is formed on the traction block. The traction inclined surface is connected to the guide plane and is set at an angle to it.

[0009] In the aforementioned negative angle bending stamping device, an inverted U-shaped groove is provided in the guide block, a base is installed on the lower die base, the traction block is connected to the base and together they form a bending relief groove, and the U-shaped groove and the bending relief groove are interconnected.

[0010] In the aforementioned negative angle bending and stamping device, the drive block is provided with a connecting shaft and a bending wheel. The bending wheel is mounted on the connecting shaft, and an annular groove is formed on the bending wheel. The annular groove is movably engaged with the pipe.

[0011] In the aforementioned negative angle bending stamping device, the bending mechanism further includes a mounting base and a limiting block disposed on the upper die base. A rotating shaft is disposed inside the mounting base, and an extension block extending into the mounting base is formed on the top wall of the driving block. The rotating shaft is movably connected to the extension block. The limiting block is disposed vertically on one side of the mounting base, and an elastic element is mounted on the limiting block. The elastic element movably abuts against the extension block.

[0012] In the aforementioned negative angle bending stamping device, the lower die base is further provided with a placement block and a support block. A limiting groove is formed on the placement block, and a horizontal positioning groove and an arc-shaped guide groove are formed on the support block. The horizontal positioning groove and the limiting groove are used to jointly support the pipe. The arc-shaped guide groove is connected to the horizontal positioning groove and is used to guide the end of the pipe to bend into the bent pipe.

[0013] In the aforementioned negative angle bending stamping device, the upper die holder is further provided with:

[0014] The fastener has a pressure plate connected to its bottom end. The bottom wall of the pressure plate has an anti-detachment groove, which is used to press the pipe into the horizontal positioning groove and the limiting groove.

[0015] The connecting sleeve is T-shaped, and a clearance hole is formed in the upper mold base. The connecting sleeve is movably disposed in the clearance hole and its bottom end abuts against the pressure plate. The fastener passes through the connecting sleeve and can reciprocate along the axis of the clearance hole with the connecting sleeve.

[0016] A guide post, the top end of which is connected to the upper mold base, a guide hole is provided on the pressure plate, and the bottom end of the guide post is movably inserted into the guide hole;

[0017] A nitrogen spring is disposed between the pressure plate and the upper die base to achieve automatic reset of the pressure plate.

[0018] The aforementioned negative angle bending and stamping device also includes:

[0019] A positioning block is provided on the lower mold base, and a placement groove is provided in the positioning block. The side of the pipe away from the bend pipe moves against the placement groove.

[0020] The rotating wrench and the clamping column are hinged to the lower mold base. One end of the clamping column is used to movably abut against the pipe, and the other end is movably hinged to the rotating handle with a connecting plate, so that when the rotating wrench is rotated, it can drive the clamping column to move closer to or away from the pipe.

[0021] The technical solution adopted by this utility model to solve its technical problem is to also propose a negative angle bending stamping device for bending and forming a bent pipe at an angle to the pipe, comprising:

[0022] An upper mold base and a lower mold base, wherein the upper mold base is movably disposed above the lower mold base, and the pipe is horizontally positioned and installed on the lower mold base;

[0023] The system includes a bending mechanism and a traction mechanism. The bending mechanism is mounted on the upper die base, and a driving block is movably mounted on the bending mechanism. The driving block movably abuts against the traction mechanism and is used to press the pipe. The traction mechanism is mounted on the lower die base and is used to guide the driving block to rotate relative to the upper die base.

[0024] When the upper die base approaches the lower die base, the drive block can rotate relative to the upper die base due to the traction mechanism when it actively presses the pipe, so as to bend the pipe end to form the bent pipe.

[0025] In the aforementioned negative angle bending and stamping device, the traction mechanism includes a guide block disposed on the lower die base, and the guide block has a guide slope or guide arc surface formed on the side wall near the drive block.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] (1) The negative angle bending and stamping device of this utility model guides the drive block to switch precisely between two different strokes through the traction mechanism, and the rotation action in the second bending stroke, so that each bending can follow the operation steps of first guiding bending and then rotating bending. This ensures that the quality of the pipe is not damaged, and also provides a guarantee that the formed bent pipe can meet the customer's usage requirements. The entire bending process realizes automated operation, reduces the influence of human factors, and greatly improves production efficiency, so as to meet the needs of large-scale production.

[0028] (2) The guide column guides the linear movement of the pressure plate and prevents tilting, thereby ensuring that the pressure plate firmly fixes the pipe in the horizontal positioning groove and the limiting groove through the anti-detachment groove, reducing the possible sliding or displacement during the bending process, thereby improving the accuracy of the bending angle.

[0029] (3) The limiting groove and the horizontal positioning groove together support the pipe, ensuring the stability of the pipe during the bending process; at the same time, the arc-shaped guide groove provides a clear bending path for the pipe end, ensuring that the bent pipe is accurately formed according to the design requirements. Attached Figure Description

[0030] Figure 1 This is an exploded view of the area between the upper and lower mold bases;

[0031] Figure 2 This is a schematic diagram of the upper mold base;

[0032] Figure 3 This is a schematic diagram of the installation structure between the drive block, bending wheel, and elastic component;

[0033] Figure 4 yes Figure 2 Schematic diagram of the cross section at point AA;

[0034] Figure 5 This is a schematic diagram of the installation structure of the lower mold base;

[0035] Figure 6 This is a schematic diagram of the installation structure between the placement block and the support block;

[0036] Figure 7 This is a schematic diagram of the installation structure of the traction ramp on the guide block;

[0037] Figure 8 This is a schematic diagram of the installation structure of the traction arc surface on the guide block.

[0038] In the diagram, 1 is the pipe; 10 is the bend in the pipe.

[0039] 2. Upper mold base; 20. Fastener; 21. Pressure plate; 210. Anti-dislodgement groove; 211. Guide hole; 22. Connecting sleeve; 23. Relief hole; 24. Guide post; 25. Nitrogen spring; 26. Guide sleeve; 27. First limit post;

[0040] 3. Lower mold base; 30. Base; 31. Placement block; 310. Limiting groove; 32. Support block; 320. Horizontal positioning groove; 321. Arc-shaped guide groove; 322. Locking groove; 33. Positioning block; 330. Placement groove; 34. Rotating wrench; 35. Clamping post; 350. Connecting plate; 36. Anti-slip block; 37. Guide post; 38. Second limiting post;

[0041] 4. Bending mechanism; 40. Drive block; 400. Extension block; 401. Transition arc surface; 41. Connecting shaft; 42. Bending wheel; 420. Annular groove; 43. Mounting base; 430. Rotating shaft; 44. Limiting block; 45. Elastic element;

[0042] 5. Traction mechanism; 50. Guide block; 500. Guide plane; 501. U-shaped groove; 51. Traction block; 510. Traction ramp; 511. Bending relief groove; 52. Guide block; 520. Guide ramp; 521. Guide arc surface. Detailed Implementation

[0043] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0044] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0045] Example 1:

[0046] like Figures 1 to 8As shown, this utility model discloses a negative angle bending and stamping device for bending a pipe 1 into a bent pipe 10 at an angle to it. The device includes: an upper die base 2 and a lower die base 3, with the upper die base 2 movably positioned above the lower die base 3, and the pipe 1 horizontally positioned on the lower die base 3; a bending mechanism 4 and a traction mechanism 5, with the bending mechanism 4 located on the upper die base 2 and having a drive block 40 that can switch between a first bending stroke and a second bending stroke; the traction mechanism 5 located on the lower die base 3, used to guide the drive block 40 to switch between the first bending stroke and the second bending stroke; when the upper die base 2 approaches the lower die base 3, the drive block 40 in the first bending stroke moves against the traction mechanism 5 to guide the drive block 40 to bend the pipe 1 vertically; when the drive block 40 switches to the second bending stroke, the traction mechanism 5 can push the drive block 40 to rotate relative to the upper die base 2 to bend the pipe 1 into a bent pipe 10 at its end.

[0047] This first embodiment is mainly for bending the end of pipe 1 (which is U-shaped) into a bent pipe 10. Specifically, as shown in the example... Figures 1 to 6 As shown, before operation, a worker or robot can horizontally position the pipe 1 to be processed on the lower mold base 3 (see reference). Figure 1 To ensure the correct position of the pipe 1, the following steps are taken: When the upper mold base 2 moves down close to the lower mold base 3, the drive block 40 in the bending mechanism 4 on the upper mold base 2 is in the first bending stroke position. At this time, the drive block 40 will contact the traction mechanism 5 set on the lower mold base 3. Relying on the guiding action of the traction mechanism 5, the drive block 40 moves vertically and applies pressure to the pipe 1, starting the first bending operation and forming an initial angle of bending. As the drive block 40 continues to move downward vertically, the traction mechanism 5 gradually switches the drive block 40 to the second bending stroke. For this reason, the traction mechanism 5 plays a key role at this time, that is, guiding and pushing the drive block 40 to rotate relative to the upper mold base 2. As the drive block 40 rotates, it will continue to apply different torques to the pipe 1, causing the end of the pipe 1 to bend further, and finally forming the required bent pipe 10. Therefore, it can be seen that the step-by-step bending stroke design in this embodiment can more accurately control the bending angle, ensuring the consistency and accuracy of the forming of the bent tube 10, and ensuring that the quality of the finished product is not affected. Moreover, the automated bending process can reduce manual intervention, speed up production, and reduce the probability of errors.

[0048] The traction mechanism 5 includes a guide block 50 and a traction block 51. The side wall of the guide block 50 forms a guide plane 500. The traction block 51 is connected to the bottom wall of the guide block 50, and a traction ramp 510 is formed on the traction block 51. The traction ramp 510 is connected to the guide plane 500 and is set at an angle to it.

[0049] like Figure 1 and Figure 5 As shown, the traction mechanism 5 in this embodiment mainly consists of two parts: a guide block 50 and a traction block 51. When the upper mold base 2 moves downward, the drive block 40 first contacts the guide plane 500 on the guide block 50. The guide plane 500 ensures the initial alignment of the drive block 40 in the vertical direction, so that the bending force can be transmitted to the pipe 1 along the correct path to form the initial bending angle. Once the first bending stroke is completed, the drive block 40 reaches the position of the traction inclined plane 510 during its continuous downward movement. The angle between the traction inclined plane 510 and the guide plane 500 is designed to guide the drive block 40 from vertical movement to rotational movement at the appropriate time. As the drive block 40 contacts the traction inclined plane 510, due to the angle design of the inclined plane, it will gradually deviate from the vertical direction during its continued downward movement. At the same time, it is pushed by the traction inclined plane 510, causing the drive block 40 to rotate relative to the upper mold base 2, so that it applies a new torque to the end of the pipe 1 while rotating, so that the end of the pipe 1 is bent into the required bent pipe 10 according to the predetermined design. Therefore, through the cooperative design of the guide block 50 and the traction block 51, this embodiment ensures that the movement path and force of the drive block 40 are well controlled throughout the working process, greatly improving the bending accuracy. Moreover, the presence of the traction ramp 510 allows the drive block 40 to smoothly transition from vertical bending to end forming, avoiding stress concentration problems that may be caused by sudden changes in the direction of force, and helping to maintain the integrity of the pipe 1 material and the quality of the finished product.

[0050] Preferably, in this embodiment, a transition arc surface 401 is formed at one end of the bottom wall of the drive block 40 near the guide block 50 and the traction block 51. The transition arc surface 401 movably abuts against the guide plane 500 or the traction inclined plane 510, which helps to improve the smoothness and stability of the drive block 40 in the process of converting vertical movement into rotational motion, and avoids positional interference between the drive block 40 and the traction block 51, which would affect the accuracy of the pipe 1 when bending.

[0051] An inverted U-shaped groove 501 is provided inside the guide block 50. A base 30 is installed on the lower mold base 3. The traction block 51 is connected to the base 30 and together they form a bending relief groove 511. The U-shaped groove 501 and the bending relief groove 511 are interconnected.

[0052] More preferably, such as Figure 1 As shown, when the pipe 1 is horizontally installed on the lower mold base 3, the end of the pipe 1 extends into the U-shaped groove 501. As the drive block 40 moves downward against the guide plane 500, the drive block 40 squeezes the pipe 1 and causes it to move along the opening of the U-shaped groove 501 (i.e., along...). Figure 1Similarly, as the drive block 40 moves against the traction inclined surface 510, the end of the pipe 1 can be bent along the direction of the bending relief groove 511. Thus, the cooperative design of the U-shaped groove 501 and the bending relief groove 511 ensures that the path of the drive block 40 is pre-set throughout the operation, thereby guiding and limiting the bending of the pipe 1, preventing radial deviation and affecting the accuracy and quality of the bent pipe, and ensuring the precision of the bending angle and force control.

[0053] The drive block 40 is provided with a connecting shaft 41 and a bending wheel 42. The bending wheel 42 is mounted on the connecting shaft 41, and an annular groove 420 is provided on the bending wheel 42. The annular groove 420 is movably engaged with the pipe 1.

[0054] like Figure 2 and Figure 3 As shown, it should be noted that the annular groove 420 on the bending wheel 42 can be pre-adjusted during the manufacturing process to match the outer diameter of the pipe 1, ensuring that when the bending wheel 42 contacts the pipe 1, it can be firmly engaged with the pipe 1 without causing damage. Specifically, when the upper mold base 2 drives the drive block 40 to move downwards, the bending wheel 42 first contacts the surface of the pipe 1 through the annular groove 420. At this time, the design of the annular groove 420 ensures that the bending wheel 42 can fit tightly against the pipe 1, providing a good initial contact point. As the drive block 40 moves downwards along the guide plane 500, the bending wheel 42 applies uniform pressure to the pipe 1 through the annular groove 420, and begins to perform preliminary vertical bending. The design of the annular groove 420 ensures uniform pressure distribution, reduces local stress concentration, and helps protect the pipe 1 material from damage. When the drive block 40 reaches the position of the traction slope 510, the annular groove 420 continues to provide stable support. At the same time, relying on the rotation of the bending wheel 42 relative to the pipe 1, the pipe 1 and the bending wheel 42 slide against each other during the bending process, effectively reducing the friction generated when the drive block 40 drives the pipe 1 to bend, and also ensuring that the pipe 1 will not slip during the bending process, thus improving the stability of the operation.

[0055] The bending mechanism 4 also includes a mounting base 43 and a limiting block 44 disposed on the upper die base 2. A rotating shaft 430 is disposed inside the mounting base 43. An extension block 400 extending into the mounting base 43 is formed on the top wall of the drive block 40. The rotating shaft 430 is movably connected to the extension block 400. The limiting block 44 is disposed on one side of the mounting base 43 in a vertical direction, and an elastic element 45 is installed on the limiting block 44. The elastic element 45 movably abuts against the extension block 400.

[0056] Continue to refer to Figure 2 and Figure 3During the first bending stroke, the drive block 40 moves against the guide plane 500. At this time, the extension block 400 does not drive the rotating shaft 430 to rotate relative to the upper mold base 2 (and the elastic element 45 is in an uncompressed state), ensuring that the pipe 1 always bends in the vertical direction during the initial bending process. As the traction inclined plane 510 pushes the drive block 40 to switch to the second bending stroke, the drive block 40 moves along... Figure 3 During clockwise rotation, the extension block 400 synchronously drives the rotating shaft 430 to rotate relative to the upper die base 2. This causes the elastic element 45 to gradually compress towards the limiting block 44 as the pipe 1 gradually forms the bent pipe 10. Because of this, the buffering effect provided by the elastic element 45 absorbs some of the impact energy, reducing the hard impact of the bending wheel 42 on the pipe 1 during bending, extending the service life of the drive block 40 and the bending wheel 42, and also reducing the risk of damage to the pipe 1 material. Similarly, under the elastic force of the elastic element 45, as the upper die base 2 lifts during the forming of the bent pipe 10 (i.e., moves away from the lower die base 3), the drive block 40 can automatically reset again due to the elastic reset capability of the elastic element 45. Figure 1 The initial state shown is to facilitate the normal bending process of subsequent pipe 1. It should be noted that the elastic element 45 in this embodiment can be replaced by other elastic devices such as a return spring, compression spring, or torsion spring.

[0057] The lower mold base 3 is also provided with a placement block 31 and a support block 32. A limiting groove 310 is formed on the placement block 31, and a horizontal positioning groove 320 and an arc-shaped guide groove 321 are formed on the support block 32. The horizontal positioning groove 320 and the limiting groove 310 are used to jointly support the pipe 1. The arc-shaped guide groove 321 is connected to the horizontal positioning groove 320 and is used to guide the end of the pipe 1 to be bent into a bent pipe 10.

[0058] like Figure 1 , Figure 5 and Figure 6As shown, to facilitate the placement of the pipe 10 to be bent, this embodiment uses a combination of a limiting groove 310 and a horizontal positioning groove 320 to ensure precise horizontal positioning of the pipe 1. As the upper mold base 2 moves downward and presses against the lower mold base 3, the stability of the pipe 1 during the bending process is effectively guaranteed. In addition, this embodiment also has an arc-shaped guide groove 321 connected to the end of the horizontal positioning groove 320. When the driving block 40 slides along the traction inclined plane 510 and gradually forms a rotational motion, the arc-shaped guide groove 321 guides the end of the pipe 1 to bend along a predetermined path, ultimately forming the required bent pipe 10. Therefore, the multi-point support structure provided by the placement block 31 and the support block 32 enhances the stability of the pipe 1 throughout the bending process, reduces errors caused by external factors, and provides a precise path for the bending of the pipe 1 end using the arc-shaped guide groove 321, ensuring consistency in bending angle and shape, and improving the product qualification rate.

[0059] The upper mold base 2 is also provided with: a fastener 20, the bottom end of which is connected to a pressure plate 21. The bottom wall of the pressure plate 21 is provided with an anti-detachment groove 210, which is used to press the pipe 1 into the horizontal positioning groove 320 and the limiting groove 310; a T-shaped connecting sleeve 22, in which a relief hole 23 is formed in the upper mold base 2. The connecting sleeve 22 is movably disposed in the relief hole 23 and its bottom end abuts against the pressure plate 21. The fastener 20 passes through the connecting sleeve 22 and can reciprocate along the axis of the relief hole 23 with the connecting sleeve 22; a guide post 24, the top end of which is connected to the upper mold base 2. The pressure plate 21 is provided with a guide hole 211, and the bottom end of the guide post 24 is movably inserted into the guide hole 211; and a nitrogen spring 25, which is disposed between the pressure plate 21 and the upper mold base 2 to realize the automatic reset of the pressure plate 21.

[0060] like Figure 2 and Figure 4As shown, during the process of bending the end of pipe 1 into bent pipe 10, the stability of the part of pipe 1 near bent pipe 10 plays a crucial role in the overall bending quality. Specifically, when the upper die 2 moves downward and approaches the lower die 3, the pressure plate 21 can first contact pipe 1 and abut against the aforementioned placement block 31 and support block 32. At this time, the anti-detachment groove 210 on the bottom wall of the pressure plate 21, together with the horizontal positioning groove 320 and the limiting groove 310, restricts the movement of pipe 1 in the radial direction, thus ensuring the stability of pipe 1 during the bending process. As the upper die 2 continues to move downward, the fastener 20 and the connecting sleeve 22 can slide in the clearance hole 23. At the same time, the guide post 24 on the upper die 2 moves through the guide hole 211, thus playing a guiding and positioning role in the process of the pressure plate 21 pressing the pipe 1. It should be noted that in this embodiment, a locking groove 322 is also formed on the side wall of the support block 32. As the guide post 24 passes through the guide hole 211, it can be movably inserted into the locking groove 322 to ensure the stability of the pressure plate 21 when pressing the pipe 1. In the above process, the nitrogen spring 25 plays a buffering role when the pressure plate 21 presses the pipe 1, which helps to protect the pipe 1 from damage and ensures that the quality of the bent pipe 10 meets the required usage requirements.

[0061] Preferably, the fastener 20 in this embodiment can be replaced by other connecting parts such as screws or bolts. Through the threaded connection between the fastener 20 and the pressure plate 21, and in conjunction with the design of the above-mentioned clearance hole 23 and guide hole 211, the pressure plate 21 is moved in the upper mold base 2, which provides a guarantee for the stability of the pipe 1 during the fixed pressing operation.

[0062] This solution also includes: a positioning block 33, which is set on the lower mold base 3. A placement groove 330 is opened in the positioning block 33. The side of the pipe 1 away from the bend pipe 10 is movably abutted against the placement groove 330; a rotating wrench 34 and a clamping column 35. The rotating wrench 34 is hinged to the lower mold base 3. One end of the clamping column 35 is used to movably abut against the pipe 1. The other end is movably hinged to the rotating handle with a connecting plate 350, so that when the rotating wrench 34 is rotated, it can drive the clamping column 35 to move closer to or away from the pipe 1.

[0063] like Figure 5 As shown, during the process of horizontally placing pipe 1 into the aforementioned placement block 31 and support block 32, the end of pipe 1 (arranged in a U-shape) away from the bent pipe 10 to be formed is pressed against the placement groove 330. (Refer to...) Figure 5In the state shown, the worker or robot can apply rotational force by turning the wrench 34, which drives the clamping column 35 to move along the axial direction and abut against the pipe 1 via the connecting plate 350. It is the cooperation between the clamping column 35 and the placement groove 330 that provides sidewall support for the pipe 1, enhances the stability of the overall structure of the pipe 1, and effectively avoids the overall processing error caused by slippage of the pipe 1. It should be noted that the overall structure and working principle of the clamping operation of the clamping column 35 against the pipe 1 can be referenced from the clamping methods commonly used in mechanical fixtures, which will not be elaborated here.

[0064] Preferably, in this embodiment, an anti-slip block 36 is also provided on the side wall of the lower mold base 3. Since both ends of the pipe 1 (which is U-shaped) need to be formed into bent pipes 10, the anti-slip block 36 is located below the support block 32 and can restrict and fix the bent pipes 10 that have been bent, so as to ensure that the entire pipe 1 can maintain absolute stability when the other end of the pipe 1 is bent.

[0065] Example 2:

[0066] A negative angle bending and stamping device is used to bend a pipe 1 to form a bent pipe 10 at an angle to it. The device includes: an upper die base 2 and a lower die base 3, the upper die base 2 being movably disposed above the lower die base 3, and the pipe 1 being horizontally positioned on the lower die base 3; a bending mechanism 4 and a traction mechanism 5, the bending mechanism 4 being disposed on the upper die base 2, and a driving block 40 being movably disposed on the bending mechanism 4, the driving block 40 moving against the traction mechanism 5 and used to press the pipe 1; the traction mechanism 5 being disposed on the lower die base 3, used to guide the driving block 40 to rotate relative to the upper die base 2; when the upper die base 2 approaches the lower die base 3, the driving block 40 can rotate relative to the upper die base 2 due to the traction mechanism 5 while pressing the pipe 1, so as to bend the pipe 1 at the end to form a bent pipe 10.

[0067] More preferably, this second embodiment is a corresponding improvement made based on the first embodiment described above. Specifically, for example... Figures 7 to 8 As shown, with all other structures being the same, the traction mechanism 5 is different. As the upper mold base 2 drives the bending mechanism 4 to move downward, the driving block 40 can apply the bending force to the pipe 1 by relying on the traction mechanism 5 while rotating relative to the upper mold base 2. During this process, the bending force can be evenly distributed on the pipe 1, avoiding local stress concentration and damage to the pipe 1. It can be seen that the traction mechanism 5 in this embodiment 2 directly guides the movement path of the driving block 40 in the entire bending process, ensuring that the accuracy of the bending angle and shape can meet the required usage requirements.

[0068] The traction mechanism 5 includes a guide block 52 disposed on the lower mold base 3. The guide block 52 has a guide slope 520 or a guide arc surface 521 formed on the side wall near the drive block 40.

[0069] More preferably, such as Figure 7 and Figure 8 As shown, in this second embodiment, the guide block 50 and traction block 51 from the first embodiment are integrally formed into a guide block 52 (of course, this second embodiment can also be designed as a separate unit depending on the actual processing difficulty and precision requirements). Through the guide slope 520 or guide arc surface 521 formed on the guide block 52, the drive block 40 is effectively guided to rotate synchronously relative to the upper mold base 2 during its downward movement. This allows the bending wheel 42 to gradually bend the pipe 1 along a preset path to form the required bent pipe 10. The guide block 52 allows the drive block 40 to rotate flexibly as needed, adapting to different types of bending requirements and enhancing the application range and flexibility of the equipment. It should be noted that, apart from the above structure, the use and working principle of the bending wheel 42 and other components are the same as in the first embodiment, and will not be described in detail here.

[0070] More preferably, in both Embodiment 1 and Embodiment 2, a guide sleeve 26 and a first limiting post 27 can be installed on the upper die base 2, and a guide post 37 and a second limiting post 38 can be installed on the lower die base 3. During the process of the upper die base 2 moving and approaching the lower die base 3, the guide sleeve 26 is movably sleeved on the guide post 37, which ensures the accuracy of the movement and contact between the drive block 40 and the traction mechanism 5. At the same time, the first limiting post 27 is movably pressed against the second limiting post 38, which effectively limits the maximum distance that the upper die base 2 moves towards the lower die base 3 when the pipe 1 is bent and formed, ensuring the accuracy and stability of the stamping device during operation.

[0071] It should be noted that in this invention, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0072] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0073] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A negative angle bending stamping device, used for bending a pipe into a bent pipe at an angle to it, characterized in that, include: An upper mold base and a lower mold base, wherein the upper mold base is movably disposed above the lower mold base, and the pipe is horizontally positioned and installed on the lower mold base; A bending mechanism and a traction mechanism are provided. The bending mechanism is disposed on the upper die base and has a drive block that can switch between a first bending stroke and a second bending stroke. The traction mechanism is disposed on the lower die base and is used to guide the drive block to switch between the first bending stroke and the second bending stroke. When the upper die base approaches the lower die base, the drive block in the first bending stroke moves against the traction mechanism to guide the drive block to bend the pipe in the vertical direction; when the drive block switches to the second bending stroke, the traction mechanism can push the drive block to rotate relative to the upper die base to bend the pipe end into a bent pipe.

2. The negative angle bending and stamping device according to claim 1, characterized in that, The traction mechanism includes a guide block and a traction block. The side wall of the guide block forms a guide plane. The traction block is connected to the bottom wall of the guide block and a traction ramp is formed on the traction block. The traction ramp is connected to the guide plane and is set at an angle to it.

3. The negative angle bending and stamping device according to claim 2, characterized in that, The guide block has an inverted U-shaped groove, the lower mold base is equipped with a base, the traction block is connected to the base and together they form a bending relief groove, and the U-shaped groove and the bending relief groove are interconnected.

4. The negative angle bending and stamping device according to claim 2, characterized in that, The drive block is provided with a connecting shaft and a bending wheel. The bending wheel is mounted on the connecting shaft and has an annular groove, which is movably engaged with the pipe.

5. The negative angle bending and stamping device according to claim 1, characterized in that, The bending mechanism further includes a mounting base and a limiting block disposed on the upper die base. A rotating shaft is disposed inside the mounting base, and an extension block extending into the mounting base is formed on the top wall of the driving block. The rotating shaft is movably connected to the extension block. The limiting block is disposed vertically on one side of the mounting base, and an elastic element is mounted on the limiting block. The elastic element movably abuts against the extension block.

6. The negative angle bending and stamping device according to claim 4, characterized in that, The lower mold base is also provided with a placement block and a support block. A limiting groove is formed on the placement block, and a horizontal positioning groove and an arc-shaped guide groove are formed on the support block. The horizontal positioning groove and the limiting groove are used to support the pipe together. The arc-shaped guide groove is connected to the horizontal positioning groove and is used to guide the end of the pipe to be bent into the bent pipe.

7. The negative angle bending and stamping device according to claim 6, characterized in that, The upper mold base is also provided with: The fastener has a pressure plate connected to its bottom end. The bottom wall of the pressure plate has an anti-detachment groove, which is used to press the pipe into the horizontal positioning groove and the limiting groove. The connecting sleeve is T-shaped, and a clearance hole is formed in the upper mold base. The connecting sleeve is movably disposed in the clearance hole and its bottom end abuts against the pressure plate. The fastener passes through the connecting sleeve and can reciprocate along the axis of the clearance hole with the connecting sleeve. A guide post, the top end of which is connected to the upper mold base, a guide hole is provided on the pressure plate, and the bottom end of the guide post is movably inserted into the guide hole; A nitrogen spring is disposed between the pressure plate and the upper die base to achieve automatic reset of the pressure plate.

8. A negative angle bending and stamping device according to claim 6, characterized in that, Also includes: A positioning block is provided on the lower mold base, and a placement groove is provided in the positioning block. The side of the pipe away from the bend pipe moves against the placement groove. A rotating wrench and a clamping post are used. The rotating wrench is hinged to the lower mold base. One end of the clamping post is used to movably abut against the pipe, and the other end is movably hinged to the rotating wrench with a connecting plate, so that when the rotating wrench is rotated, it can drive the clamping post to move closer to or away from the pipe.

9. A negative angle bending stamping device, used for bending a pipe into a bent pipe at an angle to it, characterized in that, include: An upper mold base and a lower mold base, wherein the upper mold base is movably disposed above the lower mold base, and the pipe is horizontally positioned and installed on the lower mold base; The system includes a bending mechanism and a traction mechanism. The bending mechanism is mounted on the upper die base, and a driving block is movably mounted on the bending mechanism. The driving block movably abuts against the traction mechanism and is used to press the pipe. The traction mechanism is mounted on the lower die base and is used to guide the driving block to rotate relative to the upper die base. When the upper die base approaches the lower die base, the drive block can rotate relative to the upper die base due to the traction mechanism when it actively presses the pipe, so as to bend the pipe end to form the bent pipe.

10. A negative angle bending and stamping device according to claim 9, characterized in that, The traction mechanism includes a guide block disposed on the lower mold base, and the guide block has a guide slope or guide arc surface formed on the side wall near the drive block.

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